/Engine/Source/Runtime/SlateCore/Public/Widgets/SWindow.h
typedef [TPanelChildren](API\Runtime\SlateCore\Layout\TPanelChildren)< [FPopupLayerSlot](API\Runtime\SlateCore\Widgets\FPopupLayerSlot) >::[FScopedWidgetSlotArguments](API\Runtime\SlateCore\Widgets\SWindow\FScopedWidgetSlotArguments) FScopedWidgetSlotArguments